Journal of

Refrigeration

Air Conditioning

Heating & Ventilation

STM JOURNALSScientific Technical Medical

(JoRACHV)

May - August 2014

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Industrial Tribology Machine Dynamics & Maintenance

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Indian Institute of Technology Delhi, India.

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Alternative Energy Technology Laboratory,

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Dr. Balaram Kundu Associate Professor, Department of Mechanical Engineering, Jadavpur

University, Kolkata, India.

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Manipal, India.

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Electronic Engineering National Research University ITMO ,St.

Petersburg, Russia.

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Azad NIT, Bhopal, India.

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Technology –BHU, India.

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Mechanical Engineering, Shiv Nadar University, Dadri, India.

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Engineering Department IIT Banaras Hindu University, India.

Dr. Tanweer HussainAssociate Professor, Dept. of

Mechanical Engineering , Mehran University of Engineering and

Technology, Pakistan.

I take the privilege to present the print version for the Volume 1 Issue (2) of Journal of Refrigeration,

Air Conditioning, Heating and Ventilation. The intension of JoRACHV is to create an atmosphere

that stimulates creativeness, research and growth in the area of Refrigeration, Air Conditioning,

Heating and Ventilation.

The development and growth of the mankind is the consequence of brilliant Research done by

eminent Scientists and Engineers in every field. JoRACHV provides an outlet for Research findings

and reviews in areas of Refrigeration, Air Conditioning, Heating and Ventilation found to be relevant

for National and International recent developments & research initiative.

The aim and scope of the Journal is to provide an academic medium and an important reference for

the advancement and dissemination of Research results that support high level learning, teaching and

research in the domain of Refrigeration, Air Conditioning, Heating and Ventilation.

Finally, and Authors for their continued support and invaluable contributions and suggestions in the

form of authoring I express my sincere gratitude and thanks to our Editorial/ Reviewer board write

ups/ reviewing and providing constructive comments for the advancement of the journals. With

regards to their due continuous support and co-operation, we have been able to publish quality

Research/Reviews findings for our customers base.

I hope you will enjoy reading this issue and we welcome your feedback on any aspect of the Journal.

Dr. Archana Mehrotra

Director

STM Journals

Director's Desk

STM JOURNALS

1. Studying the Effects of Reheat on R134A Cycle Performance using Industrial Air-Conditioning Training Equipment K. Anderson, C. McNamara 1

2. Thermodynamic Design Data of NH -LiNO Absorption Heat Pump Systems for Simultaneous 3 3

Cooling and Heating using ANN Approach Dheerendra Vikram Singh, Govind Maheshwari, Manoj Modi 7

3. First Law Analysis of Adsorption Cooling SystemJaspalsinh B Dabhi, Ajitkumar N Shukla 14

4. Mathematical Model of a Silica Gel Water Adsorption Refrigeration System at Adsorption EquilibriumAnirban Sur, Randip K. Das 24

5. An Exergetic based Assessment of Biogas as an Energy Source in a Hybrid Refrigeration System A. Gupta, Y. Anand, S. Anand, S. K. Tyagi 31

ContentsJournal of Refrigeration, Air Conditioning, Heating and Ventilation

JoRACHV (2014)© STM Journals 2014. All Rights Reserved

Journal of Refrigeration, Air Conditioning, Heating and Ventilation

Volume 1, Issue 2

www.stmjournals.com

Studying the Effects of Reheat on R134A Cycle

Performance using Industrial Air-Conditioning

Training Equipment

K. Anderson*, C. McNamara Mechanical Engineering Department, California State Polytechnic University at Pomona, USA

Abstract This paper presents an apparatus-based experiment for teaching air conditioning and

refrigeration in undergraduate engineering hands-on based learning curricula. Results for an R134A based refrigeration and air conditioning performance are shown in this

paper illustrating the effects of re-heat on the COP of the cycle as well as the use on a LabView interface to extract test data. The primary use of this equipment is to show

various “what-if” scenarios. In the present case, the effects of reheat on R134A cycle

performance are illustrated. The COP is found to be 2.9 corresponding ton, an EER = 10 BTU/W-hr and the sensible heat ratio for the psychrometric process is 80%.

Keywords: Air conditioning, LabView, reheat, R134A

JoRACHV (2014) © STM Journals 2014. All Rights Reserved

Journal of Refrigeration, Air Conditioning, Heating and Ventilation

Volume 1, Issue 2

www.stmjournals.com

Thermodynamic Design Data of NH3-LiNO3 Absorption

Heat Pump Systems for Simultaneous Cooling and

Heating using ANN Approach

Dheerendra Vikram Singh1*, Govind Maheshwari

2, Manoj Modi

1

1Shri Vaishnav Institute of Technology & Science, Indore, India

2Institute of Engineering & Technology – DAVV, Indore, India

Abstract The aim of this study is to train neural network which predicts thermodynamic design

data without involving role of thermodynamic properties, temperature concentration

complex relationship and formula of coefficient of performance. Authors have presented values of weights and bias obtained from the trained ANN through which one can

formulate mathematical equations for predicting thermodynamic design data. Authors have achieved coefficient of multiple determinations R

2 as 1, 1, 0.99999 for solution

concentration in absorber and generator and enthalpy-based coefficient of performance

respectively which are quite satisfactory to validate ANN approach for this study.

Keywords: Absorption refrigeration system, ANN, thermodynamic design data,

solution concentration, Ammonia-LiNO3

JoRACHV (2014)© STM Journals 2014. All Rights Reserved

Journal of Refrigeration, Air Conditioning, Heating and Ventilation

Volume 1, Issue 2

www.stmjournals.com

First Law Analysis of Adsorption Cooling System

Jaspalsinh B Dabhi*, Ajitkumar N Shukla School of Technology, PDPU, Gandhinagar, India

Abstract Steady state thermodynamic differential analysis is developed for the adsorption-based

cooling systems. The introduced thermodynamic model represents the behaviour of adsorption cooling systems, based on a precise, reasonable, and clear fundamental

approach. The energy conservation principle is used to analyze components and processes in the system. The dynamics of adsorption is expressed using Dubinin-Astakhov

adsorption equilibrium model. Energy interactions are evaluated to determine the

theoretical performance and the operating parameters of the system. The effect of pressure and temperature on the adsorption/desorption capacity of silica gel is presented

as candidate. The case studied developed reports cooling system build using Silica gel-

water as the working pair.

Keywords: Sorption Cooling, Silica gel, energy balance, thermal cooling

JoRACHV (2014) © STM Journals 2014. All Rights Reserved

Journal of Refrigeration, Air Conditioning, Heating and Ventilation

Volume 1, Issue 2

www.stmjournals.com

Mathematical Model of a Silica Gel Water Adsorption

Refrigeration System at Adsorption Equilibrium

Anirban Sur1, Randip K. Das

2*

1Department of Mechanical Engineering, Inderprastha Engineering College, Sahibabad, U.P., India 2Department of Mechanical Engg. & Mining Machinery Engg, Indian School of Mines, Dhanbad

Jharkhand, India

Abstract CFC (ChloroFluoroCarbon) and HCFC (HydroFluoroCarbon) refrigerants, which are

used for vapour compression refrigeration cycles cause serious environment problems. So research is going on solar refrigeration (producing cooling effect using solar energy is a

promising way to achieve sustainable development, since the energy used is free and not

harmful for the environment) and also used for environment friendly refrigerants. In this paper, heat and mass transfer analysis of adsorption refrigeration system is done in

which solar energy as well as environment friendly refrigerant is used. The proposed

adsorption refrigeration system is based on silica-gel–water adsorption pair. The heat source is waste heat from diesel engine and solar energy simultaneously. The

performance of the proposed cycle is evaluated with the help of the mathematical model at equilibrium condition, is compared with the performance of the basic two-bed

adsorption refrigeration cycle. This makes the system a continuous process. It is seen that

the cooling effect as well as COP of the proposed cycle is superior to the basic cycle. The system is developed for cold storage in rural area where availability of electricity is very

less.

Keywords: Adsorption, Adsorbent, Refrigerant, Adsorbent bed, Adsorbate, Solar heat

JoRACHV (2014)© STM Journals 2014. All Rights Reserved

Journal of Refrigeration, Air Conditioning, Heating and Ventilation

Volume 1, Issue 2

www.stmjournals.com

An Exergetic based Assessment of Biogas as an Energy

Source in a Hybrid Refrigeration System

A. Gupta1, Y. Anand

1, S. Anand

1*, S. K. Tyagi

2

1School of Energy Management, Shri Mata Vaishno Devi University, Katra, J & K, India

2Sardar Swaran Singh National Institute of Renewable Energy, Kapurthala, Punjab, India

Abstract The analysis of biogas operated Ammonia-Water vapor compression absorption (hybrid)

refrigeration system was carried out based on computational model being developed and the thermodynamic properties of working fluids have been used from the computer code.

The variation of performance parameters such as exergy loss, COPCOOLING,

COPHEATING and Exergy efficiency are studied with varying generator temperature, evaporator temperature, condenser and absorber temperature. The results indicate that

maximum COP cooling as well COP heating value are found to be at generator

temperature of 80 o

C for the same variation in the generator temperature from 80 o

C

–135 o

C. The effect of the varying cooling capacity on the exergy loss in different

components as well as exergy efficiency is also studied in the analysis of the hybrid system which revealed the maximum exergy loss is found in the generator which goes on

increasing with an increase in the cooling capacity of the system.

Keywords: Biogas, Boiler, Hybrid system, Compressor, COP, Exergy